KR102520614B1 - Tile flooring and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a tile flooring material and a method for manufacturing the same, and relates to a tile flooring material excellent in preventing transfer of irregularities on a floor and a method for manufacturing the same.

Description

Tile flooring and method for manufacturing the same {Tile flooring and method for manufacturing the same}

The present invention relates to a tile flooring material and a method for manufacturing the same, and relates to a tile flooring material excellent in preventing transfer of irregularities on a floor and a method for manufacturing the same.

As an example of a flooring material, laminated flooring is obtained by laminating a surface layer including a paper or fibrous substrate impregnated with a thermosetting resin such as melamine resin or phenol resin on the upper surface of a wooden substrate such as MDF (Medium Density Fibreboard) or HDF (High Density Fiberboard). , Polyvinylchloride (hereinafter referred to as 'PVC') tile flooring has been developed due to the problem of discoloration or deformation by absorbing moisture due to the resin included in the surface layer.

On the other hand, the PVC used in the PVC tile flooring as described above necessarily uses a plasticizer for processability. In this case, the PVC tile flooring is flexible and has excellent stability and workability, but the unevenness of the floor after construction There was a problem in that the appearance was significantly deteriorated compared to the flooring material by being transferred to the surface.

In order to solve this problem, technicians in the related art additionally performed a self-leveling operation to flatten the floor surface by pouring a mortar composition on the floor (ie, concrete) before tile flooring construction, but the cost is high. It is expensive and practically difficult to apply in the domestic construction environment.

The PVC tile flooring material is disclosed in, for example, Korean Patent Publication No. 10-2007-0048831.

KR 10-2007-0048831 A (published date: 2007.05.10)

In order to solve the problems of the prior art as described above, an object of the present invention is to provide a tile flooring material excellent in preventing transfer of irregularities on the floor.

In order to achieve the above purpose,

The present invention is a base layer comprising a polyvinyl chloride resin from the bottom to the top, and a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer; printing layer; And it provides a tile flooring material having a shore D of 65-88 including a surface treatment layer.

In addition, the present invention is a base layer comprising a polyvinyl chloride resin, and a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer; Forming a; and a printing layer, respectively;

the base layer from bottom to top; and a printing layer; plying the step; and

Forming a surface treatment layer on top of the plywood printed layer; provides a method for manufacturing a tile flooring material having a hardness (Shore D) of 65-88, including.

The tile flooring material of the present invention has an excellent effect of preventing transfer of irregularities on the floor.

1 is a side cross-sectional view showing an embodiment of a tile flooring material according to the present invention.
2 is a side cross-sectional view showing another embodiment of a tile flooring material according to the present invention.
3 is a side cross-sectional view showing another embodiment of a tile flooring material according to the present invention.
4 is a side cross-sectional view schematically showing a finished product having a Tongue and Groove (T&G) structure as an embodiment of a tile flooring material according to the present invention.
5 is a cross-sectional side view schematically showing a finished product having a click structure as another embodiment of a tile flooring material according to the present invention.

Hereinafter, the present invention will be described in detail with accompanying drawings.

Conventional PVC tile flooring is flexible and has excellent stability and workability, but after construction, the unevenness of the floor is transferred to the surface of the flooring material, resulting in a deterioration in the appearance of the tile flooring material.

As a result of research to solve this problem, the present inventors have confirmed that when the thickest base layer, which has the most influence on the physical properties of PVC tile flooring, is manufactured hard, the prevention of uneven transfer of the floor is excellent, and this Based on this, the present invention was completed.

Referring to Figure 1, the present invention, from bottom to top, a base layer 30 comprising a polyvinyl chloride resin, and a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer; a printed layer 50; And it relates to a tile flooring material (1) having a shore D of 65-88, including a surface treatment layer (80).

Specifically, the tile flooring material of the present invention has a hardness (shore D) of 65-88, 70-85, or 70-80. It may have a hardness within the above range because it is undesirable to have poor stability and/or stability.

The hardness can be measured with a Shore Durometer D.

Hereinafter, each layer will be described in detail.

base layer (30)

The base layer 30 of the present invention is the thickest layer of the tile flooring material, and the present invention hardens the base layer to increase the hardness of the tile flooring material 1, thereby preventing the uneven transfer of the floor. .

Specifically, the base layer 30 of the present invention may include a polyvinyl chloride resin and a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer.

The polyvinyl chloride resin is not particularly limited as long as it is not plasticized and has a glass transition temperature of about 80 ° C. However, as a homopolymer made by suspension polymerization, a general-purpose polyvinyl chloride resin that can be applied to both soft and hard products can be used. there is.

For example, the polyvinyl chloride resin may have a polymerization degree of 700-1800 or 750-1500, and may have excellent processability, durability, and mechanical properties within the above range.

The copolymer of the aromatic vinyl monomer and the vinyl cyan monomer has a relatively high glass transition temperature and excellent rigidity compared to the polyvinyl chloride resin, and can impart hardness to the base layer 30 .

The copolymer of the aromatic vinyl monomer and vinyl cyan monomer may be, for example, a bulk polymer, an emulsion polymer, or a suspension polymer.

Specifically, the aromatic vinyl monomer may be, for example, at least one selected from the group consisting of styrene, α-methylstyrene, o-ethylstyrene, p-ethylstyrene, and vinyltoluene, and in one embodiment, the polyvinyl chloride resin and styrene with excellent compatibility can be used.

The vinyl cyan monomer may be, for example, at least one selected from the group consisting of acrylonitrile, methacrylonitrile, and ethacrylonitrile. You can use ronitrile.

The amount of acrylonitrile contained in the copolymer of the aromatic vinyl monomer and vinyl cyan monomer may be 15-30% by weight, 18-25% by weight or 20-24% by weight. If it is less than the above range, the stiffness is lowered and the improvement in preventing the transfer of irregularities of the floor is insignificant. If it exceeds the above range, compatibility with the polyvinyl chloride resin is not good, and the melt flow rate is low, so the workability of the base layer is lowered. can be included

In addition, the copolymer of the aromatic vinyl monomer and the vinyl cyan monomer has a melt flow rate (Melt Flow Rate, MFR) of 40-100g/10min (220℃, 10kg), 50-75g/10min (220℃, 10kg) or 55 -70g/10min (220℃, 10kg). If it is less than the above range, calendering processability may be deteriorated, and thus the production yield of the flooring may be low. If it exceeds the above range, it is difficult to polymerize the copolymer, so that the melt flow rate may be within the above range.

The melt flow rate can be measured according to ISO 1133.

In addition, the copolymer of the aromatic vinyl monomer and vinyl cyan monomer may have a glass transition temperature (Tg) of 90-120 °C or 95-115 °C. If it is less than the above range, the effect of increasing the glass transition temperature of the base layer 30 is insignificant, so that the prevention of uneven transfer of the floor is insignificant.

The glass transition temperature (Tg) can be measured using differential scanning calorimetry (DSC).

In addition, the copolymer of the aromatic vinyl monomer and vinyl cyan monomer may have a weight average molecular weight (Mw) of 100,000-300,000 g/mol or 120,000-200,000 g/mole. If it is less than the above range, it is difficult to impart hardness to the base layer, and the prevention of uneven transfer of the floor is insignificant. Since it is lowered, it may have a weight average molecular weight within the above range.

The weight average molecular weight can be measured using GPC (Gel Permeation Chromatography).

In addition, the copolymer of the aromatic vinyl monomer and the vinyl cyan monomer may have a flexural strength of 100-180Mpa or 105-150Mpa, and has excellent stiffness within the above range to impart hardness to the base layer 30. There are possible effects.

The flexural strength may be measured under conditions of 20-25° C. according to ISO 178.

In addition, the copolymer of the aromatic vinyl monomer and the vinyl cyan monomer may have a Rockwell hardness (R scale) of 100-150R or 110-140R, and has excellent stiffness within the above range, making the base layer 30 hard. There is an effect that can grant

The Rockwell hardness can be measured according to ISO 2039-2.

In addition, optionally, a copolymer of the aromatic vinyl monomer and the vinyl cyan monomer may further contain a conjugated diene monomer, and in this case, impact resistance and rigidity are more excellent.

Specifically, the conjugated diene monomer is 1 selected from the group consisting of 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-butadiene, 1,3-pentadiene and isoprene. It may be more than one species, and in the present invention, 1,3-butadiene may be used as an example of the conjugated diene monomer.

The conjugated diene monomer may be included in 5-30% by weight or 5-25% by weight based on 100% by weight of the total monomers, and in this case, there is an effect of excellent stiffness and excellent physical property balance.

The copolymer of an aromatic vinyl monomer and a vinyl cyan monomer including the conjugated diene monomer may have a glass transition temperature (Tg) of 100-120°C or 105-115°C, and the base layer 30 has excellent processability within the above range. However, it has an excellent effect of preventing uneven transfer of the floor.

In addition, optionally, a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer described above and a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer including a conjugated diene monomer may be mixed and used. In this case, the impact strength, heat resistance and rigidity are excellent. It works.

The copolymer of the aromatic vinyl monomer and the vinyl cyan monomer or the copolymer of the aromatic vinyl monomer and the vinyl cyan monomer including the conjugated diene monomer is 5 to 40 parts by weight and 7 to 30 parts by weight based on 100 parts by weight of the polyvinyl chloride resin. or 10-20 parts by weight. If it is less than the above range, it is difficult to impart hardness to the base layer, so that the transfer of irregularities on the floor is insignificant. In addition to deterioration, cost efficiency is not good, which is undesirable, so it can be used within the above range.

Meanwhile, the base layer 30 of the present invention may further include a plasticizer and a filler.

In particular, the base layer 30 of the present invention includes a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer having the above-described characteristics, so that the amount of plasticizer used is reduced compared to the case of containing a polyvinyl chloride resin alone as a conventional resin. can be minimized.

The plasticizer may be at least one selected from a phthalate-based plasticizer, a terephthalate-based plasticizer, a benzoate-based plasticizer, a citrate-based plasticizer, a phosphate-based plasticizer, or an adipate-based plasticizer.

The plasticizer may be used in an amount of 3 to 20 parts by weight, 5 to 15 parts by weight, or 5 to 10 parts by weight based on 100 parts by weight of the polyvinyl chloride resin. If it is less than the above range, the workability of the base layer is reduced, and if it exceeds the above range, it is difficult to impart hardness to the base layer, so that the transfer of irregularities on the floor is insignificant, so it can be used within the above content range.

The filler may be at least one selected from the group consisting of calcium carbonate, wood powder, mica, amorphous silica, talc, zeolite, magnesium carbonate, calcium sulfate, calcium phosphate, magnesium phosphate, aluminum oxide, kaolin, ATH (Alumina trihydrate), and talc. And, preferably, inexpensive calcium carbonate can be used.

The filler may be used in an amount of 100 to 500 parts by weight or 150 to 400 parts by weight based on 100 parts by weight of the polyvinyl chloride resin, and within the above range, the price is appropriate and the base layer has excellent processability.

In addition, the base layer 30 of the present invention may optionally further include one or more additives selected from the group consisting of a heat stabilizer, a lubricant, and a flame retardant, and the type and content thereof are not particularly limited, but one embodiment For example, it may be included in 0.5-10 parts by weight based on 100 parts by weight of the polyvinyl chloride resin.

Having the above characteristics, the base layer 30 of the present invention may have a thickness of 0.5-5mm or 1-3.5mm, and increase the hardness of the tile flooring material 1 while maintaining an appropriate manufacturing cost within the above range. There is an excellent effect of preventing uneven transfer.

In addition, the base layer 30 may have a glass transition temperature of 50 ° C or more, specifically 50-90 ° C, 55-90 ° C or 58-85 ° C, and within the above range, polyvinyl chloride resin as a conventional resin alone It is higher than the glass transition temperature (about 30 ° C) of the base layer prepared by using, and has an excellent effect in preventing the transfer of irregularities on the floor.

In addition, the base layer 30 may have a flexural strength of 5-20 kgf/cm ² or 9-18 kgf/cm ² , and has a high strength within the above range, so that it has an excellent effect of preventing uneven transfer of the floor.

According to ASTM D790, the flexural strength of the base layer is prepared as a specimen having a length, width, and thickness of 220 mm x 50 mm x 3 mm, and the specimen is placed on two supports 200 m apart. Thereafter, force applied to the center of the specimen at a speed of 100 m/min may measure the force when the specimen is destroyed.

In addition, the base layer 30 may have a heat distortion temperature (HDT) of 40 ° C or more, specifically 40-90 ° C, 50-90 ° C or 55-80 ° C, and has excellent heat resistance within the above range, including this. The dimensional stability of tile flooring has an excellent effect.

The heat deflection temperature is determined by preparing the base layer as a specimen having a length, width, and thickness of 80 mm x 10 mm x 3 mm in accordance with the ISO 75-1 standard, and the specimen is a support in a heating bath containing oil Place the specimen on a bed so that it is immersed in oil to a depth of at least 50 mm. Then, after setting the deformation value of the specimen after 5 minutes of applying a load of 80 g to the specimen to 0, and raising the temperature of the heating bath at a constant rate of 120 ± 10 ° C / h, the specimen sag under the load At this time, the temperature when the specimen is deformed by 0.3 mm can be measured.

In addition, the base layer 30 may have a hardness of 60-90 or 70-85, and within this range, there is an excellent effect of preventing uneven transfer of the floor.

The hardness can be measured with a Shore Durometer D.

In addition, the base layer 30 may have a dimensional change rate of 0.01 to 0.05% or 0.01 to 0.03%, and has an effect of having excellent dimensional stability required as a base layer within the above range.

The dimensional change rate is the length change rate of the specimen after preparing the base layer as a specimen having a length, width, and thickness of 300 mm x 150 mm x 3 mm, staying at 80 ° C. for 6 hours, and leaving the specimen at room temperature for 1 hour. can measure

In addition, the base layer 30 has a surface compressibility of 0.05 mm or less or 0.04 mm or less, and within the above range, there is an effect of excellent restorability. The lower limit of the surface compressibility is not limited, but may be, for example, 0 mm or more or 0.005 mm or more.

The surface compressibility can be measured by pressing the base layer with a pressure of 950-1150 psi for 23-24 hours, removing the pressure, and then measuring the pressed depth after 23-24 hours.

printed layer (50)

The printed layer 50 of the present invention is laminated on the base layer 30 to give various appearance and design effects to the tile flooring 1, and is laminated (laminated) on the base layer 30 It may be formed through transfer printing on the surface of a white sheet or a colored sheet (not shown).

In the present invention, an example of the case where the printing layer 50 is formed through transfer printing on the surface of a white sheet or a colored sheet has been described, but is not limited thereto, and is formed through transfer printing on the surface of a colored sheet of a different color or the base layer ( 30) may be directly formed on the surface through gravure or screen printing.

In one embodiment, the white sheet may include 10 to 30 parts by weight of a plasticizer and a pigment based on 100 parts by weight of the polyvinyl chloride resin.

Since the types of the polyvinyl chloride resin and the plasticizer are the same as the polyvinyl chloride resin and the plasticizer included in the base layer 30 described above, duplicate descriptions will be omitted.

The plasticizer may be used in an amount of 10-30 parts by weight or 15-28 parts by weight, and has an effect of providing excellent processability within the above range.

For example, titanium dioxide (TiO ₂ ) may be used as the pigment, but other pigments of a desired color may be used without being limited thereto. The content of the pigment is not limited, but may be used in an amount of 5-30 parts by weight or 10-20 parts by weight, for example, and has an effect of imparting excellent color within the above range.

In addition, the printed layer 50 of the present invention may optionally further include one or more additives selected from the group consisting of a heat stabilizer, a lubricant, and a flame retardant, and the type and content thereof are not particularly limited, but one embodiment For example, it may be included in 0.5-10 parts by weight based on 100 parts by weight of the polyvinyl chloride resin.

The printed layer 50 may have a thickness of 0.01-0.5 mm or 0.05-0.45 mm, but is not limited thereto.

surface treatment layer (80)

The surface treatment layer 80 improves scratch resistance and abrasion resistance of the surface of the tile flooring material and serves to prevent adhesion of contaminants, and can be formed by coating a conventional photocurable resin and then irradiating UV. .

The surface treatment layer 80 may have a thickness of 0.005-0.1 mm or 0.01-0.05 mm, and excellent scratch resistance and abrasion resistance of the tile flooring material within the above range are effective.

The tile flooring material of the present invention may optionally further include a transparent layer 70 between the printing layer 50 and the surface treatment layer 80, and further include a balance layer 20 under the base layer 30. Yes (see Figure 2).

Alternatively, the tile flooring material of the present invention optionally further includes a transparent layer 70 between the printing layer 50 and the surface treatment layer 80, and the balance layer 20 and the foam layer under the base layer 30 (10) may be further included (see FIG. 3).

A description of each layer is as follows.

transparent layer (70)

The transparent layer 70 of the present invention protects the printed pattern or pattern of the lower printed layer 50, and in one embodiment may include 20-50 parts by weight of a plasticizer based on 100 parts by weight of polyvinyl chloride resin.

Since the types of polyvinyl chloride resin and plasticizer are the same as those of the polyvinyl chloride resin and plasticizer included in the base layer 30 described above, overlapping descriptions will be omitted.

The plasticizer may be used in an amount of 20-50 parts by weight or 25-40 parts by weight based on 100 parts by weight of the polyvinyl chloride resin, and has an effect of providing excellent processability within the above range.

In addition, the transparent layer 70 may optionally further include one or more additives selected from the group consisting of a heat stabilizer, a lubricant, and a flame retardant, and the type and content thereof are not particularly limited, but in one embodiment, the above It may be included in 0.5-10 parts by weight based on 100 parts by weight of polyvinyl chloride resin.

The transparent layer 70 may be a film having a thickness of 0.15 to 1.5 mm or 0.2 to 1.0 mm, and protects the printed layer 50 located at the lower portion within the above range, as well as maintaining an appropriate price. there is

balance layer (20)

The balance layer 20 serves to prevent twisting and bending of tile flooring, and in one embodiment may include 10-40 parts by weight of a plasticizer and 30-80 parts by weight of a filler based on 100 parts by weight of polyvinyl chloride resin. .

Since the types of polyvinyl chloride resin, plasticizer, and filler are the same as the polyvinyl chloride resin, plasticizer, and filler included in the base layer 30 described above, overlapping descriptions will be omitted.

The plasticizer may be used in an amount of 10 to 40 parts by weight or 15 to 30 parts by weight based on 100 parts by weight of the polyvinyl chloride resin, and has an effect of providing excellent processability within the above range.

The filler may be used in an amount of 30 to 80 parts by weight or 40 to 70 parts by weight based on 100 parts by weight of the polyvinyl chloride resin, and the balance layer may have excellent processability while being priced appropriately within the above range.

In addition, the balance layer 20 may optionally further include one or more additives selected from the group consisting of a heat stabilizer, a lubricant, and a flame retardant, and the type and content thereof are not particularly limited, but in one embodiment, the above It may be included in 0.5-10 parts by weight based on 100 parts by weight of polyvinyl chloride resin.

In addition, the balance layer 20 may have a thickness of 0.1-0.7mm or 0.15-0.5mm, and within the above range, there is an effect of preventing distortion and bending of the tile flooring material.

foam layer (10)

The foam layer 10 imparts sound insulation to tile flooring and prevents discoloration due to moisture, and polyvinyl chloride foam, irradiation crosslinked polyolefin foam, or ethylene vinyl acetate foam may be used, but is not limited thereto.

The foam layer 10 may have a thickness of 1 to 10 mm or 2 to 7 mm, and within this range, there is an effect of providing sound insulation to tile flooring.

The foam layer 10 may be laminated on the lower portion of the balance layer 20 using a known hot melt adhesive or primer.

The tile flooring material 1 of the present invention may have a dimensional change rate of 0.01-0.05% or 0.01-0.03%, and has an effect of having excellent dimensional stability required as a tile flooring material within the above range.

The dimensional change rate is the length change rate of the specimen after preparing the tile flooring material as a specimen having a length, width, and thickness of 300 mm x 150 mm x 5 mm, staying at 80 ° C for 6 hours, and leaving the specimen at room temperature for 1 hour. can be measured

In addition, the tile flooring material 1 of the present invention has a surface compressibility of 0.05 mm or less or 0.03 mm or less, and has excellent restorability within the above range. The lower limit of the surface compressibility is not limited, but may be, for example, 0 mm or more or 0.005 mm or more.

The surface compressibility can be measured by pressing the tile flooring material at a pressure of 950-1150 psi for 23-24 hours, then removing the pressure, and then measuring the pressed depth after 23-24 hours.

On the other hand, the present invention is a base layer comprising a polyvinyl chloride resin, and a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer; And forming a printing layer, respectively (S1);

the base layer from bottom to top; And a printing layer; step of plywood (S3); and

It relates to a method for manufacturing a tile flooring material having a hardness (Shore D) of 65-88, including forming a surface treatment layer on top of the laminated printed layer (S5).

Hereinafter, the manufacturing method for manufacturing the tile flooring material 1 of the present invention will be described in more detail.

base layer and the printed layer Each forming step (S1)

The step (S1) is a step of forming a base layer and a print layer, respectively, and may be a step of preparing each of the base layer composition and the print layer composition into a sheet or film shape using extrusion molding or calendering molding.

In the present invention, as an embodiment, calendering molding with excellent productivity may be used. Specifically, the base layer composition and the print layer composition are each kneaded at 140-190 ° C or 150-180 ° C, and the kneaded composition is 160-180 ° C. It can be produced by passing through calender rolls at a temperature of 180°C or 160-170°C.

Since the composition of the base layer and the composition of the printed layer are the same as those of the base layer and the printed layer described above, overlapping descriptions will be omitted.

In addition, the composition of the printed layer may refer to a composition of a white sheet, and in this case, a printed pattern or pattern may be transferred to the white sheet.

In the present invention, an example of the case where the printing layer is formed through transfer printing on the surface of a white sheet has been described, but is not limited thereto, and is formed through transfer printing on the surface of a colored sheet of a different color or gravure directly on the base layer Alternatively, it may be formed through screen printing or the like.

base layer and the printed layer Plywood step (S3)

The (S3) step may be a step of sequentially thermally plying the base layer and the printed layer prepared above at a temperature of 150-170 ° C or 160-170 ° C from the bottom to the top.

surface treatment layer Forming step (S5)

The (S5) step is a step of forming a surface treatment layer on top of the printed layer that has passed through the plywood process, and can be formed by coating a conventional photocurable resin and irradiating UV.

Optionally, when the tile flooring material of the present invention further includes a balance layer and a transparent layer, the step of forming the balance layer and the transparent layer may be further performed in the step (S1), in this case, in the step (S3), from the bottom to the top In this way, the balance layer, base layer, printing layer and transparent layer prepared above can be sequentially laminated.

Optionally, when the tile flooring material of the present invention further includes a foam layer, the step of forming the foam layer in the step (S1) may be further performed. In this case, after the step (S3), the balance layer is formed. If the balance layer is included, the foam layer may be laminated after coating a known hot-melt adhesive or primer on the lower portion of the balance layer, or on the lower portion of the base layer when the balance layer is not included.

The tile flooring material of the present invention manufactured as described above optionally has a tongue and tongue structure including an insertion part (Tongue: 100) and a groove (Groove: 200) as shown in FIG. 4 in the subsequent cutting and processing process. The connection structure by groove) can be continuously fitted.

Alternatively, as shown in FIG. 5, the tile flooring material of the present invention is optionally formed by a click structure including two insertion parts 100 and two grooves 200 formed at both ends in the longitudinal and width directions. It can be fitted and coupled in succession to the connection structure.

Hereinafter, preferred embodiments are presented to aid understanding of the present invention, but the following examples are merely illustrative of the present invention, and various changes and modifications are possible within the scope and spirit of the present invention. It is obvious to those skilled in the art, It goes without saying that these changes and modifications fall within the scope of the appended claims.

[ Example ] Manufacturing of tile flooring

<Example 1>

(1) Balance layer, base layer, printing layer and transparent layer formation step

(formation of balance layer)

Based on 100 parts by weight of polyvinyl chloride resin (LG Chem, LS080), 20 parts by weight of plasticizer (LG Chem, DOTP), 50 parts by weight of filler (calcium carbonate), and 3 parts by weight of heat stabilizer were kneaded at 160 ° C. with a Banbari mixer to balance After preparing the layer composition, it was calendered at a temperature of 160-170° C. to form a balance layer having a thickness of 0.5 mm.

(base layer formation)

10 parts by weight of a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer, 10 parts by weight of a plasticizer (DOTP, LG Chem), 250 parts by weight of a filler (calcium carbonate) and heat After preparing a base layer composition by kneading 3 parts by weight of the stabilizer at 160 ° C. with a Banbari mixer, it was calendered at a temperature of 160-170 ° C. to form a base layer having a thickness of 3.0 mm.

The copolymer of the aromatic vinyl monomer and vinyl cyan monomer contains 20% by weight of acrylonitrile (AN), has a melt flow rate (MFR) of 60g/10min (220°C, 10kg), and a glass transition temperature (Tg) of 101 °C, a weight average molecular weight (Mw) of 150,000 g/mol, a flexural strength of 115 Mpa (23 °C), and a Rockwell hardness of 124R. A styrene-acrylonitrile copolymer (SAN) was used.

(Formation of printed layer)

Based on 100 parts by weight of polyvinyl chloride resin (LG Chem, LS080), 20 parts by weight of a plasticizer (LG Chem, DOTP), 2 parts by weight of a heat stabilizer, and 10 parts by weight of a pigment (TiO ₂ ) were kneaded at 160 ° C with a Banbari mixer to obtain a white color. After preparing the sheet composition, it was calendered at a temperature of 160-170° C. to form a white sheet having a thickness of 0.45 mm.

Subsequently, a printed layer was formed by forming a printed pattern on the surface of the white sheet through a gravure printing or transfer printing method.

(formation of transparent layer)

Polyvinyl chloride resin (LG Chem, LS080) 100 parts by weight of plasticizer (LG Chem, DOTP) 30 parts by weight and heat stabilizer 3 parts by weight were kneaded at 160 ° C. with a Banbari mixer to prepare a transparent layer composition, which was then mixed at 160- A transparent film having a thickness of 1.0 mm was formed by calendering at a temperature of 170 °C.

(2) Balance layer, base layer, printing layer and transparent layer plying step

The balance layer prepared above sequentially from the bottom to the top; base layer; printing layer; And a transparent layer; after laminating, it was thermally laminated at a temperature of 160 ℃.

(3) Surface treatment layer formation step

Subsequently, a photocurable resin was applied on top of the transparent layer, and UV was irradiated to form a surface treatment layer having a thickness of 0.05 mm to prepare a tile flooring material of Example 1 having a thickness of 5 mm.

<Example 2>

The base layer composition contains 15 parts by weight of a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer based on 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS080), 10 parts by weight of a plasticizer (DOTP, LG Chem), and 250 parts by weight of a filler (calcium carbonate). A tile flooring material was prepared in the same manner as in Example 1, except for including 3 parts by weight of the weight part and the heat stabilizer.

The copolymer of the aromatic vinyl monomer and vinyl cyan monomer was the same as in Example 1.

<Example 3>

The base layer composition is a polyvinyl chloride resin (LG Chem, LS080) 10 parts by weight of a copolymer of an aromatic vinyl monomer, a vinyl cyan monomer and a conjugated diene monomer based on 100 parts by weight, a plasticizer (LG Chem, DOTP) 10 parts by weight, a filler ( A tile flooring material was prepared in the same manner as in Example 1, except that 250 parts by weight of calcium carbonate) and 3 parts by weight of a heat stabilizer were included.

The copolymer of the aromatic vinyl monomer, vinyl cyan monomer, and conjugated diene monomer has an acrylonitrile content of 15-35% by weight, a butadiene content of 5-30% by weight, and a styrene content of 40-60% by weight. It has a glass transition temperature (Tg) of 105℃, a melt flow rate (MFR) of 55g/10min (220℃, 10kg), a weight average molecular weight (Mw) of 150,000g/mol, a flexural strength of 120Mpa (23℃), Rockwell An acrylonitrile-butadiene-styrene copolymer having a hardness of 130R was used.

<Comparative Example 1>

Except that the base layer composition includes 25 parts by weight of a plasticizer (LG Chem, DOTP), 250 parts by weight of a filler (calcium carbonate), and 3 parts by weight of a heat stabilizer based on 100 parts by weight of polyvinyl chloride resin (LG Chem, LS100) A tile flooring material was prepared in the same manner as in Example 1.

<Reference Example 1>

Base layer composition 2 parts by weight of a copolymer of aromatic vinyl monomer and vinyl cyan monomer based on 100 parts by weight of polyvinyl chloride resin (LS080, LG Chem), 10 parts by weight plasticizer (DOTP, LG Chem), 250 parts by weight filler (calcium carbonate) A tile flooring material was prepared in the same manner as in Example 1, except for including 3 parts by weight of the weight part and the heat stabilizer.

The copolymer of the aromatic vinyl monomer and vinyl cyan monomer was the same as in Example 1.

<Reference Example 2>

Base layer composition 50 parts by weight of a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer based on 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS080), 10 parts by weight of a plasticizer (LG Chem, DOTP), 250 parts by weight of a filler (calcium carbonate) A tile flooring material was prepared in the same manner as in Example 1, except for including 3 parts by weight of the weight part and the heat stabilizer.

The copolymer of the aromatic vinyl monomer and vinyl cyan monomer was the same as in Example 1.

<Reference Example 3>

The base layer composition contains 10 parts by weight of a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer based on 100 parts by weight of a polyvinyl chloride resin (LS080, LG Chem), 25 parts by weight of a plasticizer (DOTP, LG Chem), and 250 parts by weight of a filler (calcium carbonate). A tile flooring material was prepared in the same manner as in Example 1, except for including 3 parts by weight of the weight part and the heat stabilizer.

The copolymer of the aromatic vinyl monomer and vinyl cyan monomer was the same as in Example 1.

<Reference Example 4>

The base layer composition is polyvinyl chloride resin (LG Chem, LS080) 10 parts by weight of a copolymer of aromatic vinyl monomer and vinyl cyan monomer based on 100 parts by weight, plasticizer (LG Chem, DOTP) 10 parts by weight, filler (calcium carbonate) 250 A tile flooring material was prepared in the same manner as in Example 1, except for including 3 parts by weight of the weight part and the heat stabilizer.

The copolymer of the aromatic vinyl monomer and vinyl cyan monomer has an acrylonitrile content of 35% by weight, a melt flow rate (MFR) of 30g/10min (220°C, 10kg), a glass transition temperature (Tg) of 102°C, A styrene-acrylonitrile copolymer having a weight average molecular weight (Mw) of 200,000 g/mol, a flexural strength of 140 Mpa (23° C.), and a Rockwell hardness of 140R was used.

<Reference Example 5>

The base layer composition is polyvinyl chloride resin (LG Chem, LS080) 10 parts by weight of a copolymer of aromatic vinyl monomer and vinyl cyan monomer based on 100 parts by weight, plasticizer (LG Chem, DOTP) 10 parts by weight, filler (calcium carbonate) 250 A tile flooring material was prepared in the same manner as in Example 1, except for including 3 parts by weight of the weight part and the heat stabilizer.

The copolymer of the aromatic vinyl monomer and vinyl cyan monomer contains 10% by weight of acrylonitrile (AN), has a melt flow rate (MFR) of 70g/10min (220°C, 10kg), and a glass transition temperature (Tg) of 100 °C, a weight average molecular weight (Mw) of 130,000 g/mol, a flexural strength of 100 Mpa (23 °C), and a Rockwell hardness of 105R. A styrene-acrylonitrile copolymer was used.

[ Experimental example ] base layer and measurement of physical properties of tile flooring

One. base layer Properties

The glass transition temperature, flexural strength, heat distortion temperature, workability, hardness, dimensional change rate, and surface compressibility of the base layer prepared above were measured, and the results are shown in Table 1 below.

(1) Glass transition temperature: measured using differential scanning calorimetry (DSC).

(2) Flexural strength: In accordance with ASTM D790, the base layer is prepared as a specimen having a length, width, and thickness of 220 mm x 50 mm x 3 mm, and the specimen is placed on two supports 200 m apart. Then, force was applied to the center of the specimen at a speed of 100 m/min to measure the force when the specimen was destroyed.

(3) Heat deflection temperature: In accordance with the ISO 75-1 standard, the base layer was prepared as a specimen having a length, width, and thickness of 80 mm x 10 mm x 3 mm, and the specimen was placed in a heating bath containing oil Place the specimen on the inner support so that it is immersed in oil to a depth of at least 50 mm. Then, after setting the deformation value of the specimen after 5 minutes of applying a load of 80 g to the specimen to 0, and raising the temperature of the heating bath at a constant rate of 120 ± 10 ° C / h, the specimen sag under the load At this time, the temperature when the specimen was deformed by 0.3 mm was measured.

(4) Processability: After forming the base layer on a double roll, the surface thereof was visually checked.

(○: The surface of the molded base layer is smooth and the processability is excellent, △: The surface of the molded base layer is somewhat uneven, X: The surface of the molded base layer is rough and the processability is poor)

(5) Hardness: Measured using a Shore Durometer D.

(6) Dimensional change rate: Length of the specimen after the base layer was prepared as a specimen having a length, width, and thickness of 300 mm x 150 mm x 3 mm, the specimen stayed at 80 ° C for 6 hours, and then left at room temperature for 1 hour. The rate of change was measured.

(7) Surface pressing property: After pressing the base layer with a pressure of 1000 psi for 24 hours and removing the pressure, the pressing depth after 24 hours was measured.

2. Measurement of physical properties of tile flooring

The hardness of the tile flooring material prepared above, prevention of uneven transfer of the floor, dimensional change rate, and surface pressability were measured, and the result values are shown in Table 1 below.

(1) Hardness: Measured using a Shore Durometer D.

(2) Prevention of transfer of irregularities on the floor: After the tile flooring material was installed on the floor, it was visually confirmed whether or not the irregularities of the floor were transferred to the surface of the flooring material.

(○: The floor irregularities are not transferred to the surface of the flooring material, so the floor irregularities transfer prevention is excellent, △: The floor irregularities are transferred to the surface (partially) of the flooring material, X: The floor irregularities are transferred to the surface (front surface) of the flooring material and the floor Uneven transcription prevention is not good)

(3) Dimensional change rate: After preparing the tile flooring material as a specimen having a length, width, and thickness of 300 mm x 150 mm x 5 mm, the specimen was kept at 80 ° C for 6 hours, and then left at room temperature for 1 hour. The length change rate was measured.

The dimensional change rate required as a tile flooring material is 0.16% or less under the above conditions.

(4) Surface Pressability: After pressing the tile flooring material at a pressure of 1000 psi for 24 hours and removing the pressure, the pressed depth after 24 hours was measured.

As confirmed in Table 1, the glass transition temperature, flexural strength, heat deflection temperature and hardness of the base layer of Examples 1 to 3 according to the present invention were compared to the base layer of Comparative Example 1 using PVC resin alone as the resin. It was confirmed that the value was larger than that, and the dimensional change rate and surface pressing properties were also excellent.

Therefore, it was confirmed that the Shore D hardness of the tile flooring materials of Examples 1 to 3 including the base layer of Examples 1 to 3 was high, and the dimensional change rate and surface pressing property were excellent while preventing floor irregularities.

On the other hand, the base layer of Comparative Example 1 using the PVC resin alone as the resin has low glass transition temperature, flexural strength, heat deflection temperature and hardness, and also has low dimensional change rate and surface compressibility. Comparative Example including the base layer It was confirmed that the tile flooring material of Example 1 was reduced in preventing transfer of floor irregularities, dimensional change rate, and surface pressing properties compared to Examples 1 to 3.

In addition, the base layer of Reference Example 1 including a copolymer of a small amount of an aromatic vinyl monomer and a vinyl cyan monomer and the base layer of Reference Example 3 using an excessive amount of a plasticizer have a higher glass transition temperature and flexure than the base layers of Examples 1 to 3. The strength, heat deflection temperature and hardness are low, and the dimensional change rate and surface pressing properties are also reduced. The tile flooring materials of Reference Examples 1 and 3 prevent transfer of floor irregularities, dimensional change rate and surface pressing compared to the tile flooring materials of Examples 1 to 3. It was observed that the strength was reduced.

In particular, it was confirmed that the workability of the base layer of Reference Example 1 was also slightly lowered.

In addition, the base layer of Reference Example 2 including a copolymer of an excess of an aromatic vinyl monomer and a vinyl cyan monomer and a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer having the same content as in Example 1, but the vinyl in the copolymer It was confirmed that the processability of the base layer of Reference Example 4 having an excessive amount of cyan monomer was reduced.

In addition, the base layer of Reference Example 5 including a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer in the same content as in Example 1, but having a small amount of the vinyl cyan monomer in the copolymer, is the base layer of Examples 1 to 3. Compared to the tile flooring materials of Examples 1 to 3, the glass transition temperature, flexural strength, heat distortion temperature and hardness are lower, and the dimensional change rate and surface compressibility are also lowered. It was confirmed that prevention, dimensional change rate, and surface depression were reduced.

1: Tile Flooring
10: foam layer 20: balance layer
30: base layer 50: printing layer
70: transparent layer 80: surface treatment layer
100: Tongue 200: Groove

Claims (20)

From bottom to top, a base layer comprising 100 parts by weight of polyvinyl chloride resin, 7-30 parts by weight of a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer, 5-15 parts by weight of a plasticizer, and 100-500 parts by weight of a filler; printing layer; And a surface treatment layer; including,
The glass transition temperature of the base layer is 50-90 ° C,
Tile flooring with a hardness (shore D) of 70-85. According to claim 1,
The aromatic vinyl monomer of the copolymer of the aromatic vinyl monomer and vinyl cyan monomer is at least one selected from the group consisting of styrene, α-methylstyrene, o-ethylstyrene, p-ethylstyrene and vinyltoluene,
The vinyl cyan monomer is at least one selected from the group consisting of acrylonitrile, methacrylonitrile and ethacrylonitrile. According to claim 1,
The copolymer of the aromatic vinyl monomer and the vinyl cyan monomer further includes a conjugated diene monomer,
The conjugated diene monomer is at least one selected from the group consisting of 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-butadiene, 1,3-pentadiene and isoprene in-tile flooring. delete According to claim 1,
The base layer is a tile flooring material having a flexural strength (ASTM D790) of 5-20 kgf / cm ² . delete delete According to claim 1,
The base layer has a dimensional change rate (80 ℃, 6hr) of 0.01-0.05% tile flooring. According to claim 1,
The base layer is a tile flooring material having a surface pressing property (1000 psi, 24 hr) of 0.05 mm or less. According to claim 1,
The tile flooring material further comprises a transparent layer between the printing layer and the surface treatment layer, and further comprises a balance layer under the base layer. According to claim 10,
The tile flooring material further comprises a foam layer under the balance layer. According to claim 10,
The tile flooring material has a dimensional change rate (80 ℃, 6hr) of 0.01-0.05%. According to claim 10,
The tile flooring material has a surface pressurization (1000 psi, 24 hr) of 0.05 mm or less. A base layer comprising 100 parts by weight of a polyvinyl chloride resin, 7-30 parts by weight of a copolymer of an aromatic vinyl monomer and a vinyl cyan monomer, 5-15 parts by weight of a plasticizer, and 100-500 parts by weight of a filler; and a printing layer; respectively forming a step (S1);
the base layer from bottom to top; And a printing layer; step of plywood (S3); and
Forming a surface treatment layer on top of the laminated printed layer (S5); including,
The glass transition temperature of the base layer is 50-90 ° C,
A method for producing a tile flooring material having a hardness (Shore D) of 70-85. According to claim 14,
The step (S1) is a step of kneading each of the base layer composition and the printing layer composition, and calendering and molding the kneaded composition. According to claim 14,
The copolymer of the aromatic vinyl monomer and vinyl cyan monomer is a styrene-acrylonitrile copolymer,
The method for producing a tile flooring material in which the content of acrylonitrile contained in the styrene-acrylonitrile copolymer is 15-30% by weight. According to claim 14,
The method for producing a tile flooring material in which the copolymer of the aromatic vinyl monomer and the vinyl cyan monomer is an acrylonitrile-butadiene-styrene copolymer further comprising a conjugated diene monomer. delete delete delete

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